Question

15x²- 28 = x
quadratic equations class 10th ​

Answer 1

Answer:

15x

15x 2

15x 2 −28=x

15x 2 −28=x15x

15x 2 −28=x15x 2

15x 2 −28=x15x 2 −x−28=0

15x 2 −28=x15x 2 −x−28=015x

15x 2 −28=x15x 2 −x−28=015x 2

15x 2 −28=x15x 2 −x−28=015x 2 −(21x−20x)28=0

15x 2 −28=x15x 2 −x−28=015x 2 −(21x−20x)28=015x

15x 2 −28=x15x 2 −x−28=015x 2 −(21x−20x)28=015x 2

15x 2 −28=x15x 2 −x−28=015x 2 −(21x−20x)28=015x 2 −21x+20x−28=0

15x 2 −28=x15x 2 −x−28=015x 2 −(21x−20x)28=015x 2 −21x+20x−28=03x(5x−7)+4(5x−7)=0

15x 2 −28=x15x 2 −x−28=015x 2 −(21x−20x)28=015x 2 −21x+20x−28=03x(5x−7)+4(5x−7)=0(3x+4)(5x−7)=0

15x 2 −28=x15x 2 −x−28=015x 2 −(21x−20x)28=015x 2 −21x+20x−28=03x(5x−7)+4(5x−7)=0(3x+4)(5x−7)=03x+4=0 or 5x−7=0

15x 2 −28=x15x 2 −x−28=015x 2 −(21x−20x)28=015x 2 −21x+20x−28=03x(5x−7)+4(5x−7)=0(3x+4)(5x−7)=03x+4=0 or 5x−7=0x=−4/3 or 7/5

Step-by-step explanation:

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Answer 2

15x² −28=x

15x² −x−28=0

15x² −(21x−20x)28=0

15x² −21x+20x−28=0

3x(5x−7)+4(5x−7)=0

(3x+4)(5x−7)=0

3x+4=0 or 5x−7=0

x=−4/3 or 7/5

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